> ## Documentation Index
> Fetch the complete documentation index at: https://docs.senderz.app/llms.txt
> Use this file to discover all available pages before exploring further.

# Warmup & reputation

> Automatic IP and domain warmup, reputation monitoring, and how Senderz protects your sending.

New sending domains and IPs need to ramp up gradually — mailbox providers distrust a cold identity that suddenly sends at volume. Senderz handles warmup and reputation monitoring for you.

## Domain warmup

Warmup is **gated on verification** and **starts automatically** the moment a domain first verifies. It's a display and scheduling ramp — a progress signal that your domain is establishing reputation.

<CardGroup cols={2}>
  <Card title="Auto-start" icon="play">
    Verifying a domain kicks off warmup. No manual step.
  </Card>

  <Card title="Read-only for tenants" icon="lock">
    The domain card shows warmup progress (day, volume sent, reputation) with
    no pause/resume — a pausable control on shared infrastructure is a
    footgun.
  </Card>
</CardGroup>

## Accelerated migration

Moving from another provider with an established reputation? Request an **accelerated warmup** from the domain card (provider + monthly volume). An operator reviews and approves, which jumps the ramp to full cap. Decisions are audit-logged and you're notified.

## IP pools

Sends are placed on the least-loaded eligible IP under a daily cap. Warming IPs advance on a reputation-gated schedule. This is managed by Senderz — you don't configure IPs.

## Reputation monitoring

Senderz polls external reputation sources and routes the scores:

* **Microsoft SNDS** (Outlook) → IP reputation.
* **Google Postmaster Tools** → per-IP and per-domain reputation.

Scores feed the warmup gate: a bad reputation quarantines, low reverses the ramp, medium holds. Both per-IP and per-domain scores surface in the deliverability view.

<Info>
  Reputation is polled every few hours. A bad-reputation gate can pause or
  reverse warmup on a degrading IP automatically.
</Info>

## Per-tenant deliverability monitoring

Because email can route through a shared relay, Senderz ranks every workspace and sending domain by bounce and complaint rate over a rolling window. If a workspace or domain breaches the thresholds (bounce warn 5% / crit 10%; complaint warn 0.1% / crit 0.3%), operators are alerted with the offenders named — so a degrading sender is caught before it hurts the pool.

<Warning>
  Keep your bounce rate under 5% and complaint rate under 0.1%. High rates
  risk suspension of your sending. Import clean lists (see
  [Importing contacts](/en/audience/import)) and honour unsubscribes promptly.
</Warning>